a Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences , Shenyang , P.R. China.
c University of Chinese Academy of Sciences , Beijing , P.R. China.
Int J Phytoremediation. 2018 Jul 29;20(9):862-868. doi: 10.1080/15226514.2018.1438357.
The role of same amendment on phytoremediating different level contaminated soils is seldom known. Soil pot culture experiment was used to compare the strengthening roles of cysteine (CY), EDTA, salicylic acid (Sa), and Tween 80 (TW) on hyperaccumulator Solanum nigrum L. phytoremediating higher level of single cadmium (Cd) or Benzo(a)pyrene (BAP) and their co-contaminated soils. Results showed that the Cd capacities (ug pot) in shoots of S. nigrum in the combined treatment T were the highest for the 5 and 15 mg kg Cd contaminated soils. When S. nigrum remediating co-contaminated soils with higher levels of Cd and BAP, that is, 5 mg kg Cd + 1 mg kg BAP and 15 mg kg Cd + 2 mg kg BAP, the treatment T showed the best enhancing remediation role. This results were different with co-contaminated soil with 0.771 mg kg Cd + 0.024 mg kg BAP. These results may tell us that the combine used of CY, SA, and TW were more useful for the contaminated soils with higher level of Cd and/or BAP. In the combined treatments of Sa+TW, CY was better than EDTA.
同种改良剂对不同污染水平土壤修复的作用鲜为人知。本研究采用土壤盆栽实验，比较半胱氨酸（CY）、乙二胺四乙酸（EDTA）、水杨酸（Sa）和吐温 80（TW）在超富集植物龙葵修复高浓度单一镉（Cd）或苯并[a]芘（BAP）污染土壤及其复合污染土壤中的强化作用。结果表明，在 5 和 15mgkgCd 污染土壤中，添加 CY、Sa、TW 组合处理（T）的龙葵植株地上部 Cd 含量最高。当龙葵修复高浓度 Cd 和 BAP 复合污染土壤时，即 5mgkgCd+1mgkgBAP 和 15mgkgCd+2mgkgBAP，T 处理表现出最好的强化修复作用。而当 Cd 和 BAP 复合污染水平较低时（0.771mgkgCd+0.024mgkgBAP），T 处理的效果并不明显。这些结果表明，CY、SA 和 TW 的联合使用对于 Cd 和/或 BAP 污染水平较高的土壤可能更有用。在 Sa+TW 联合处理中，CY 优于 EDTA。
